/Engine/Source/Runtime/Engine/Public/ChartCreation.h
This will create the file name for the file we are saving out.
static [FString](API\Runtime\Core\Containers\FString) CreateFileNameForChart ( const [FString](API\Runtime\Core\Containers\FString) & ChartType, const [FString](API\Runtime\Core\Containers\FString) & InMapName, const [FString](API\Runtime\Core\Containers\FString) & FileExtension )